package com.yang.blog.dao;

import com.yang.blog.po.Blog;
import org.springframework.data.domain.Page;
import org.springframework.data.domain.Pageable;
import org.springframework.data.jpa.repository.JpaRepository;
import org.springframework.data.jpa.repository.JpaSpecificationExecutor;
import org.springframework.data.jpa.repository.Modifying;
import org.springframework.data.jpa.repository.Query;

import javax.transaction.Transactional;
import java.util.List;

public interface BlogRepository extends JpaRepository<Blog,Long>, JpaSpecificationExecutor<Blog> {

    @Query("select b from t_blog b where b.recommend = true")
    List<Blog>findTop(Pageable pageable);

    @Query("select  b from t_blog b where b.title like ?1 or b.content like ?1")
    Page<Blog>findByQuery(String query,Pageable pageable);

    @Transactional
    @Modifying //访问更新
    @Query("update t_blog b set b.views = b.views+1 where b.id = ?1")
    int updateViews(Long id);
    // select * from 表 order by
    @Query("select function('date_format',b.updateTime,'%Y') as year from t_blog b group by function('date_format',b.updateTime,'%Y') order by year desc ")
    List<String>findGroupYear();

    @Query("select b from t_blog b where function('date_format',b.updateTime,'%Y') = ?1 ")
    List<Blog>findByYear(String year);
}
